System date, comparison of dates and adding dates to a field value of datetime type

// this extended rule explains how to take system date, compare it with date field from input data and also add some days to the field value
object sysDate;
object sysDateFormat;
string[8] sysDateString;
datetime sysDate2;

About donation

As you all know I've been doing this for over a decade and have never asked for anything from anybody. I do not have any sponsors; and all the time and money I've invested over the years has been accumulating. Now I request, if you can, please show your appreciation to the site by making a small donation for servers and site maintenance.